Wheel grip of farm tractors and other agricultural machinery



- G. A. M GREGOR Oct. 4, 1927.

WHEEL GRIP OF- FARM TRAcToRs AND OTHER AGRICULTURAL MACHINERY Filed Sept. 22, 1925 Patented st. 4, 19127.

. ieeiaea aaxi araeae ra oae Seams re se Arma P. wearer, ear-r or Tania-anemones AND oar-mas neiaronnroaar. 'MAQHIN'EBYB Application filed September 22,1925, Serial No. ensue, and' j n gusflgafligmg'y go,,;1gz5

This invention relates to improveme ts in devices for the wheels-of f m'tn qtors. principally, but. rapplicahl ilso t the wheehgrips of cultivators and other .--ag

5 cultural machinery,

Ordinarily .sixty-ztfour jgrip devices ,are I independently bolted toieachjw eel ota,

farm tractor in regular-spaced arnaage aen I and it iscustomary :fQr andag ic ti r llfi 9 provide himself with two sets of WheeLgrip;

devices, none bein-g considerabl ,larger gtha'n the other in order that the tractor will operate efliciently'infldifienenit classes of soil and under'all ordinaryclimatic conditions.

The smaller grip devices are used on the tractor wheels when the ground is hard, but thelarger grip devices are necessary when the soil is wet or moist so as to minimize slippage of the wheels. The removal'of one set of the grip devices to permit the other set to be interchangeably fitted involves the expenditure of. considerable labour and time, and the interchange is frequently rendered most difficult on account of the rusting of i the securing bolts.

The present invention has been devised to obviate the disadvantages referred to by the.

provision of simple, means whereby the wheel-grip devices can be both readily and conveniently converted from thesmaller to the larger order or type, and vice versa,

without removing or releasing the main bolts that secure the smaller grip devices to the wheels of the machine or implement;

1 as customarily, to the wheels, and the larger or.wet-weather wheel-grip devices are soconstructed thattheycan be; snugly fitted 40 over the said smaller grip devices, suitable means being provided to lock the said larger grip devices against movement and accidental detachment when the smaller grip devices arenested therein; I

Referring to the drawings 2 a me fica oeiet the inte lect.

F According to the invention, the smaller ygrip devices for dry weather use are bolted, 1

V Figure 1 illustrates in side elevation part of a farm-tractor wheel equipped with the cale in qlengitedil al sec on cro as ie respect vely, a si -1 w th? nested:

whee r ps nil associ t d 1 Figure 7 a View in ,se on im j or 'rlry-i a er' e 'Q .--a e paeisa ly. {c0

mize the. amountofis e lh man s d to sw et 1 11 of these conical grips; has an integrally formed and screw-threaded stud, 3 extending ews. 2 designates 1 the, smaller 7 thrownfrom said grips into the from the centre of itsbase. -These;screwthread-edv studs are passed through appropriately spaced holes formed in the wheel rim 4, and they are fitted'with nuts 5 that are tightened to bear against theinner sur-. ,face of the wheel rim and thussecure said conical grips in fixed position.

The cone shaped grips 2, although. fo d very suitable for dryweather conditions, are r not satisfactory when the soil is wet,as it-is ioundnecessary to provide grip devices hav mg considerably larger :gripsurfaces to pre-v sam devices 6,;preferably of prismatic design, each having a deep cone-shaped recess? formed in its base, adapting it tobe fitted.

snugly over a, dry-weather grip, device 2 w th the base portions 8 ofsaid largergrip device bearing: againstthe Outer surface of the wheel rim 4.

A semi-circular tapering recess 9 is formed in each of'thelcone-shaped grips 2 at an approved distance from 'itsibase, and holes sp gftaper are formed 7 v i v oppositely. in the walls of the largerpris: 7

matic grips 6. When the prismatic wetweather grips are turned on the cone-shaped grips2, s0 that their holes lO'are brought into register with the recesses 9in said grips 2, locking pins or keysll are driven through said holes Iandare-accommodated in said recesses, thus securely locking the larger grips by wedgingactionupon the conical dry-weather grips 2.

projecting ends of the locking pins or, keys tion orfrom other cause.v a V Figure 'Zillustrates a modified formof the e Y invention; Comprising three nested (wheel :g pl t 1 f 'Whic 7' 4 i i fjmember 2 .and Ethe intermediate member 1 3 ja re ofqconical configuration, and the outer-f f (gii ip fifisi'o'f risniaticdesign,- 'Wheel-' ito i vdlrk cfliciently in difi'erentfclass'es ofsoil and under viii-yin climatic conditions; The

I p 1 conical dryweather grip devices 2 are pro snugifitof theouter weteather grips6 is whatil do 'claimfis'ql 5 I i 11 to preclnde their tlislodgrnent byivibrathe fi'xedinn ermost grip grip evices of-ft isfnestedlform' 'wi1li b ,e' ound :i'advantageous in enabling the tractor terniediate. r'nem er 13' however xnay be so' v dimensioned 'asfto functlon solely asa wearr j in element adapted for ready replacement j. w it becomes Sworn. Byfthis jmeansfthe {and to lock thev together-u 1 a I I V In testimony whereof I affix my signature- 1 rips'forfthe Wheels offerin tradersind other agricnlturalimachinery, consisting of i in spaced relationship,larger grips of prismatic "shape formed with cavities correspending to the shape of the conical grips 7 fand adaptedr to, be ,lfitted over and snugly engage said conical'grips with their base} it '30 v portions in abutment with the surface of the Wheel rim, channelsforme'd inj'the surfaces 7 of the" small grips at right angle to the axis 'of sfaid grips, holes formed in the larger grips inalignment'withsaicl channels, and tapered retaining pins fitted through said. holes and channels toklraw the prismatic grips. inclose contact With the conicalrgrips and force thebase iportions of said prismaticgripsagainst the surface ofthe Wheel,

conical and prismatic: grips] small conical grips secured to the wheel rim I I comiou ALEXANDER lvi'ccktcon. 

